Riesel primes of the form 419•2n-1

Reserved! This sequence is currently part of Multi Reservation 8: NPLB Drive 17.

Current data

k , b : 419 , {{{Rb}}} Count : 10 Nash : 627 Max n : 2,820,000 Date : 2024-03-09 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

4, 24, 132, 9744, 40848, 44544, 178708, 237028, 255288, 885792

[[Category:Riesel {{{Rb}}}|#.....00419]][[Category:Riesel {{{Rb}}} Low-weight|#.....00419]]

History

• 2011-08-04: Reserved by NPLB Drive 13, for 1000000<n<2000000
• 2010-11-11: Checked to n = 1000000, NPLB Drive 5
• 2010-08-19: Found n = 885792, Gary Barnes
• 2008-12-22: Checked to n = 600000, NPLB Drive 1
• 2008-12-19: Reserved by NPLB Drive 5, for 600000<n<1000000
• 2008-03-25: Checked to n = 333200, NPLB Drive 2
• 2008-01-22: Reserved by NPLB Drive 2, for 260000<=n<=333200
• 2008-01-21: Reserved by NPLB Drive 1, for 333201<=n<=600000
• 2004-10-11: Found n = 255288, Peter O'braian
• 2004-10-11: Found n = 237028, Peter O'braian
• 2002-10: Found n = 178708, Dennis Okon